How to adjust the sound quality of the car amplifier？
Date: |Author:Max Lu|Vistors:56622
How to adjust the sound quality of the car amplifier？
Ready to work:
1) First, restore all the additional functions of the car main unit to the factory state, and then center all the high, medium and bass, of course, the left and right balance is the same.
2) Set the volume (GAIN) of the power amplifier to the lowest position (MIN)
3) FILTER (filter setting) is set to OFF
4) CROSSOVER is set to the lowest
5) The same is done for the subwoofer amplifier
Step 1: Host debugging
Turn on the main unit, play some high-fidelity vocal discs or discs with stronger bass dynamics, and turn the volume to more than half or 3/5. This will make it easier for the bass to match the mid-bass of the front sound field, and it is easier to produce fullness. bass.
Step 2: Front sound field debugging
We first turn up the GAIN of CHANNEL-1/2 until the sound is loud, or the loudest sound you can accept. Next, we turn the volume of the main unit down and put a vocal disc or a disc with stronger low frequency. Then turn up the volume of the main unit slowly until it is slightly louder than your normal listening sound. Well, you should listen carefully at this time. Is the human voice clear? Is there a nasal sound? The sound is clear and no nasal, or the low frequency is very elastic, there is no trailing "humming" sound, and the low frequency is not foggy at a time, then congratulations, your front door sound insulation and shock absorption installation is basically full score, in this state, your The front door mid-bass will be at its best.
Step 3: Host debugging
Usually, when the volume of the host is increased, the human voice will have a nasal sound, like a cold, or the pronunciation may be unclear, and there will be a "humming" tail sound when there is a low frequency. These conditions are the so-called resonance sound effects. clarity of sound. Resonance will cancel out a lot of the details of the sound, slow down the low frequency of the sound, and turn your 5W worth of audio equipment into a 1W sound.
Sound insulation and shock absorption is a means. In addition, we can reduce the probability of this kind of sound through the CROSSOVER (cutoff frequency) on the host or power amplifier. Let's look at the picture again. You can try to set the FILTER (filter setting) to HP ( high pass) position, the knob of CROSSOVER (cutoff frequency) is twisted to 60HZ70HZ80HZ90HZ or even 100HZ, FILTER (filter setting) and CROSSOVER (cutoff frequency) are used together, FILTER (filter setting) is only in LP or HP The adjustment of CROSSOVER (cut-off frequency) will only have an effect when the sound is not clear, we try to rotate the CROSSOVER (cut-off frequency) to see if the nasal sound of the human voice disappears or the low frequency disappears when it is twisted to that position.” "Buzzing" sound, if it is around 60~70HZ, then congratulations, the sound insulation and shock absorption are still well done.
Step 4: Rear Sound Field Tuning
No matter what state the front sound field is in, the rear sound field must be set to the HP state, and the CROSSOVER (cutoff frequency) is twisted to around 150HZ. The GAIN is twisted too much, and it is correct to "feel" the sound in the rear sound field in the front seat. If you can hear it, it means that the sound is too loud.
Step 5: Bass Adjustment
Bass adjustment is a key to car audio, and a good adjustment will make an earth-shaking change in the sound. (It is best to adjust the bass with two people, one listening in the car and one in the back). After the first four steps of debugging are completed, turn the FILTER (filter setting) of the power amplifier that pushes the bass to the LP (low-pass) position, turn the CROSSOVER (cutoff frequency) to the lowest level, and turn the GAIN to half or 3/3 of the front sound field. Position 4, then turn the volume of the main unit to the normal high position, and put in a disc with strong low frequency. If the bass is too much or the bass is foggy, the GAIN is too high. Quickly lower the GAIN of the bass, GAIN Normally you will feel that there is no bass coming out.
At this time, the helper behind the car slowly turned the CROSSOVER (cutoff frequency) up, and the sense of hearing in the car was: the bass came out slowly, but the bass sounded behind him and the sound was dull and dull, with the CROSSOVER (cutoff frequency) When the CROSSOVER (cutoff frequency) is turned up to a certain point, you will suddenly feel the combination of the bass and the low frequency of the front sound field. Together, the low frequency is no longer emitted from the back, but is integrated with the front door speaker and emitted from the front. This point is the connection frequency of the woofer and the front door (the GAIN of the bass must be adjusted together with the CROSSOVER (cutoff frequency). , remember, this is very important, and it is also the most difficult part of car audio debugging), the correct bass should be: it feels like it is emitted together with the front door speaker, and it comes from the front door. For a paragraph, you can settle down and listen to the music quietly, and make fine adjustments according to your hobbies and tastes until you are satisfied.
